The former Black Cats midfielder holds the FIFA Pro Licence and has previously worked as assistant manager at Helsingborg and with the Sweden Under-21s squad.
All Blacks captain Kieran Read has moved to allay any fears he could miss the Lions tour because of a broken thumb with the expectation he should be ready for the first test on June 24.
Arsenal's selection woes have deepened ahead of the FA Cup final after it was confirmed that Gabriel will miss out with a knee injury and Alexis Sanchez faces a race to be fit for Wembley.
Irving took over in the second half and finished with 42 points despite playing on a tender ankle, LeBron James added 34 and the Cleveland Cavaliers moved within one win of the Finals.